package com.Web.Filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;

@WebFilter(filterName = "encoding", urlPatterns = "/*")
public class EncodingFilter implements Filter {
    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        System.out.println("EncodingFilter.doFilter");
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        String method = request.getMethod();
        System.out.println("method: " + method);
        if("post".equalsIgnoreCase(method)) {   //equalsIgnoreCase 忽略大小写
            request.setCharacterEncoding("UTF-8");
        }

        filterChain.doFilter(servletRequest,servletResponse);
    }
}
